Wideband Quasi-Monostatic Simultaneous Transmit and Receive Reflector Antenna

被引：17

作者：

Prasannakumar, Prathap Valale ^{[1
,2
]}

Elmansouri, Mohamed A. ^{[1
]}

Boskovic, Ljubodrag B. ^{[1
]}

Ignatenko, Maxim ^{[1
,3
]}

Filipovic, Dejan S. ^{[1
]}

机构：

[1] Univ Colorado, Dept Elect Comp & Energy Engn, Boulder, CO 80309 USA

[2] Oculus, Menlo Pk, CA 94025 USA

[3] Custom Microwave Inc, Longmont, CO 80501 USA

来源：

IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION | 2020年 / 68卷 / 04期

关键词：

Antenna feeds; Reflector antennas; Couplings; Cavity resonators; Receiving antennas; Coaxial cavity antenna; in-band full duplex; isolation; reflector antenna; simultaneous transmit and receive (STAR); CIRCULATOR;

D O I：

10.1109/TAP.2019.2955143

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A dual polarized quasi-monostatic simultaneous transmit and receive (STAR) antenna system operating over 2:1 bandwidth with high isolation, co-polarized transmitting (TX)/receiving (RX) radiation, and high TX gain is proposed. The TX antenna is apex matched parabolic reflector illuminated by a coaxial cavity feed. The RX antenna is also coaxial cavity and mounted back-to-back with the TX feed. Thus, the configuration is termed quasi-monostatic. High front-to-back (F/B) ratio of the RX and TX feed antennas and the separation between them ensures high isolation. The fabricated system achieves 61 dB (average) isolation for CP and >38.5 dB for linearly copolarized TX and RX antennas. Moreover, the amplitude and phase imbalances in beam forming network (BFN) have lesser impact than the BFN-based STAR antenna systems. The antenna system operates from 4 to 8 GHz with VSWR <1.8, gain >7 dBic, and >20 dBic for the RX and TX, respectively. Additional techniques to further improve isolation are outlined.

引用

页码：2630 / 2637

页数：8

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